Device for compensating for tolerances in the width of matrices used in line casting machines



DEVICE FOR COMPENSATING FOR TOLERANCES IN THE WIDTH OF MATRICES USED IN LINE CASTING MACHINES Filed Feb. 9, 1954 Dec. 17, 1957 K DEBUS 2,816,649

United States Pa DEVICE FOR COMPENSATING FOR TQLERANCES IN THE WIDTH F MATRICES USED IN LWE CASTING MACHINES Karl Debus, Bad Homburg, Germany, assignor to Lino type Gesellschaft mit beschrankter Haftung, Eerlitn Tempelhof, Germany Application February 9, 1954, Serial No. 409,136

Claims priority, application Germany February 9, 1953 2 Claims. (Cl. 199-47) This invention relates to a method of and a device for compensating for tolerances in the width of matrices used in Linotype machines.

Matrices of different widths give rise to faults, such as differences in the dimension of the height of a slug produced therewith, which often cannot be overcome even by careful, tedious and expensive levelling or trimming.

It has now been found that levelling can be completely achieved in a simple manner it means are provided for pressing the matrices forming a line against the faying surfaces of a casting mould of a Linotype machine, said means being resilient and pressing all the matrices tight against the faying surfaces. Thereby the impression surfaces of the matrices, which are combined to form a line and which inevitably have varying tolerances of width, all lie in the same plane.

It is true that it is already known to provide means for pressing the matrices firmly against the mould. But a rigid rod is used for this, actually the justification rod in the first elevator of the machine. But such a rod only rests reliably against the widest matrix and accordingly this is the only matrix which receives a pressure which brings it firmly into contact with the faying surfaces of the mould, while by far the greater number of the other matrices do not rest firmly and tightly against it. Instead, their impression surfaces remain at a certain distance from the faying surfaces of the mould, thus giving rise to faulty casting, and particularly to variations in the height of the slug.

According to the invention, the resilient means is preferably a pressure member, which is resilient in itself and lies behind the matrix in the first elevator of the machine and may conveniently be a rod provided with a rubber facing. If necessary there may be provided in addition one or two justification rods.

The pressure member may, however, be a fairly long steel member, such as a fine pitch helical spring, which is so finely differentiated cross-resiliently in the axial direction that, being urged against the line, it rests with sufiicient pressure even against the thinnest matrix.

When the device is used, the procedure according to the invention is preferably such that the matrices are urged against the faying surfaces of the mould by the resilient means between the first and second justifications. The first justification means spacing by means of spacebands and is known as the rough justification, which is followed by loosening, all the matrices being then finally 2,816,649 iatented Dec. 17, 1957 set up. The second justification secures the matrices in this position during casting.

An embodiment of a device according to the invention 1s hereinafter described, by way of example, with reference to the accompanying drawing, which is a diagrammatic cross section through the first elevator and a castmg mould of a Linotype machine, the elevator carrymg a line of matrices.

Between a front elevator jaw 1, and a rear elevator jaw 2, a matrix 5 is suspended by means of lugs 3, 4 on a ledge 6 on the jaw 2, and on an upper justification rod 7, let into the jaw 1. Between said upper justification nod and a lower justification rod 10 is a pressure bar 8 with a resilient facing 9. The lower justification rod 10 rests against a ledge 11 on the jaw 1. The pressure bar 8 can be displaced towards the matrix 5, so that pressure can be applied to the matrix by suitable means at a chosen instant.

The justification rods adn the resiliently faced bar press against the backs of the matrices, bearing the signature etc. while the type or impression side 13 bearing the image of a letter 12, in turn rests against faying surfaces 14, 15 and 16 of the casting mold 17 having a hollow moulding space 18.

I claim:

1. In a line casting machine having a mould provided with faying surfaces, 21 number of matrices provided with surfaces corresponding to said faying surfaces and adapted to form a line in contact with said faying surfaces, an elevator for said matrices having a front jaw and a back jaw and two justifioation rods mounted in said front jaw, a device for compensating for tolerances in the width of said matrices comprising plastic, deformable, flexible resilient means located in front of said matrices between said justification rods and a pressure bar located in said jaw in front of said resilient means and being displaceable in said jaw towards said matrices to urge all said matrices tight against said faying surfaces.

2. In a line casting machine having a mould provided with faying surfaces, a number of matrices provided with surfaces corresponding to said faying surfaces and adapted to form a line in contact with said faying surfaces, an elevator for said matrices having a front jaw and a back jaw and two justification rods mounted in said front jaw, a device for compensating for tolerances in the width of said matrices comprising a rubber bar located in front of said matrices between said justification rods and a pressure bar located in said jaw in front of said rubber bar and being displaceable in said jaw towards said matrices to urge all said matrices tight against said faying surfaces.

References Cited in the file of this patent UNITED STATES PATENTS 232,912 Truax Oct. 5, 1880 618,308 Wich Jan. 24, 1899 796,132 Laycock Aug. 1, 1905 827,982 Laycock Aug. 7, 1906 1,006,445 Degener Oct. 17, 1911 1,611,624 Taylor Dec. 21, 1926 2,142,051 Goodbody Dec. 27, 1938 2,182,802 Frazier Dec. 12, 1939 

